Besides "official" resources GitHub shows interesting Syncope derivative projects
Like many other projects at The Apache Software Foundation, the Apache Syncope source repository is mirrored to GitHub: extending and customizing Syncope for own needs is just a fork away.
Besides this, GitHub seems also to host a whole set of Apache Syncope derivative works; most of them show that Apache Syncope, being customizable and extensible by design, is particularly keen to cloud computing.
Having first conceived then donated Apache Syncope to the ASF - and still heading its development, Tirasa is plenty of useful resources with some pre-configured bundles to quickly run Apache Syncope on
A quick search shows some interesting projects: